Thompson c



C. SBBRING.

HARVESTER PITMAN.

No. 66,047. .Patented June'2-5, 148167 'uiten gieten meut ffim,

THOMPSON C. EBRING, OF ROCHESTER, NEW YORK, SSIGNOR TO IRA A. HEBBARD, OF THE SAME PLACE.

`-Letters Patent life, 66,047', dated June' 25,l867.

IMPROVEMENT IN HARVBS'IE| PITMAN.

@he rlghnle referrer tu in time tittsr nientain making gmt nf tige simu.

TO ALL WHOM IT MAY GONCERN: n

` Be it Aknown that I, THOMPSON C. SEBRING, of Rochester, iu the county of Monroe, and State of Nen York, lute of Milford, in the county of Oakland, and State of Michigan, have invented ceri-:iin nen' and, iiseful .Improvements. in Pitman Heads for Hurvesters; and I do herely declare that Ithe following is n full, clear, and exact description thereof, reference being had to the accompnnying drawings making pnrt of this specifica# tion, in which- A i Figure 1 is nyerticnl section of the head H, and boxes B and B', taken in the plane of the red line u in iig. 2.

i Figure'2 is a top view of the same.

Like letters indien-te corresponding parts.

This invention consists mainly in providing en autoinzitic take-up, for the ivcar vbetween the crank-pin and boxes of hnrvesters, composed of a. spring a-nd wedge.

To enable others to mazlie and use my invention, I will describe its construction and operation.

4I make a shell head, H, with un oil and wnstemhamher, D, fig. l, on the under side. The cndo' the ptman P may be tapped through the end of the head, or it may be itted as shon'n in iig. l, und ,secured by the pin b. `The box B has n cylindrical bearing' upon 'the end ot'- the pilnnn P. The pivot plug C may have n spherical or a cylindrical bearing in the hack of box y13. The plug C has a groove, 1', running horizontally across its hencl.- This groove is made deeper at cach side'of the head than in Ythe centre.' Especially should the groove be made in this way if` a. cylindrical plug is used. There is u. lnortise cored in the head1-Lito receive the key lc. 'The edge of4 the key next tothe plug is parallel with the wrist-pin E, and is fitted Yto the groovez. The spring s is attached to the head-,end the loose'end notched upoh the head of the taper-key. The tension or force of this spring may be increased or diminished by the screwf by which it is attached to the heed.

It will be seen that the pitman may be thrown out of line horizontally, without cramping the wrist-pin, because the plug C mayY slide upon the edge of the key k, ns before shown, and the heed is perfectly swivelled upon the end of the Pitman and. the pivot plug. The lubieatorfchnmbcr D is stuffed iyith wa'sie, cloth, or othersnitahle' su'bstonee to hold the oil. There isla. spiral spring, y, coiled very open, as shovn in lig. 1, and it lis compressed andiinsexted beneath the waste or other s tuing, and forees it u'pngziinsvt" the journal' and boxes. The ears g and h are intended for Aattaching a. leather o1" other Enitnlileflid or cover-.1l It might be' desirable to extend the back ofthebox B to bearagainstvthe key, or its equivalent, and ineke the slot wider at each side to permit the rockingl of the head, instead of using the plug C.

What I ela-im es my invention, and desire to secure by Letters Patent, is-

'l'llevau'tomatic take-up, constructed substnntiallyas described, being composed fn spring, s, nnu n"4 tnperkcyfk, plug C, and boxes B and B', substantially as described.

'i'. c. sEBRINe.

Witnesses:

WM. SSLOUGHBOROUGH,

FRI-:U1 A. HATCH. 

